toggle bolt

noun

A fastener consisting of a threaded bolt and a spring-loaded toggle, used to secure objects to thin or hollow walls.

toggle bolt

toggle bolt

Noun

(plural toggle bolts)

A fastening device consisting of a bolt and a pair of hinged, usually sprung, wings threaded at the hinge to receive the bolt, used by inserting the bolt with wings folded into a small hole in a sheet material to the point where the wings unfold and the bolt can be tightened.